Rebuild the Docker-agent image to have numpy and opencv package available

[jsgrover2k25]

Hey, where is the the Dockerfile to rebuild devopsjourney1/myjenkinsagents:python? I want to apt-get install python3-numpy and python3-opencv.
I tried to make my own with same image name but jenkins keeps reload devopsjourney1/myjenkinsagents:python from 2 years ago.

How do I build a update version and replace the existing one?

jenkins-101$ sudo docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
80d7e51c9a06 myjenkins-blueocean:2.414.2 "/usr/bin/tini -- /u…" 2 hours ago Up 2 hours 0.0.0.0:8080->8080/tcp, :::8080->8080/tcp, 0.0.0.0:50000->50000/tcp, :::50000->50000/tcp jenkins-blueocean
9667c81e44fd alpine/socat "socat tcp-listen:23…" 3 hours ago Created elastic_shtern
7566fe7cc3d0 alpine/socat "socat tcp-listen:23…" 3 hours ago Up 3 hours 127.0.0.1:2376->2375/tcp hopeful_elbakyan
f8430c1205f2 alpine/socat "socat tcp-listen:23…" 26 hours ago Created recursing_leavitt

jenkins-101$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
myjenkins-blueocean 2.414.2 12b9e68d9a31 4 hours ago 2.19GB
alpine/socat latest 55afaa98591e 3 days ago 9.1MB
devopsjourney1/myjenkinsagents python fe573725a2e4 2 years ago 196MB